Some people’s chronic pain stems from a traumatic event, such as a physical or sexual assault, a motor vehicle accident, or some type of disaster. Under these circumstances the person may experience both chronic pain and PTSD. The person in pain may not even realize the connection between their pain and a traumatic event. Approximately 15% to 35% of patients with chronic pain also have PTSD. Only 2% of people who do not have chronic pain have PTSD. One study found that 51% of patients with chronic low back pain had PTSD symptoms. For people with chronic pain, the pain may actually serve as a reminder of the traumatic event, which will tend to make the PTSD even worse. Survivors of physical, psychological, or sexual abuse tend to be more at risk for developing certain types of chronic pain later in their lives.